STMicroelectronics STEVAL-BMS114 BMS Evaluation Board
STMicroelectronics STEVAL-BMS114 Battery Management System (BMS) Evaluation Board operates from 1 to 31 Li-ion battery nodes and supplies an elaborate monitoring network to sense each cell's voltage, current, and temperature. Each battery node manages 4 to 14 cells for a voltage range between 48V and 800V. The board implements the L99BM114, a multicell battery monitoring and balancing IC, for battery node status through stack voltage measurement, cell voltage measurement, temperature measurement, and coulomb counting. Measurement and diagnostic tasks can be executed either on demand or periodically, with a programmable cycle interval.
The STMicroelectronics STEVAL-BMS114 can work in two different daisy chain topologies: single access and dual access ring. In a single access daisy chain configuration, a series of AFE is connected to an MCU board through a single transceiver connected to the STEVAL-BMS114 isolated ISOL port. The AFEs are connected to each other via the isolated ISOH port. The MCU communicates with the STEVAL-BMS1T hosted L99BM1T transceiver via the SPI protocol. The transceiver converts these signals into ISO SPI signals to communicate with the BMS. The STEVAL-BMS1T enables converting SPI signals into isolated SPI signals, reducing the number of necessary wires from four to two, and implementing differential communication for higher noise immunity.
Features
- Hosts the L99BM114 multicell battery monitoring and balancing IC
- Voltage monitoring of every single cell and of the entire battery node
- Voltage, current, and temperature sensing of each cell
- 5 GPIOs to connect temperature sensors as NTCs
- An NTC hosted on the L99BM114 to sense the chip temperature
- Passive balancing
- 100mm x 76mm compact size
Applications
- Industrial Battery Management System (BMS)
- Portable and semi-portable equipment
- E-bikes and e-scooters
- 48V and high-voltage battery packs
Layout
Associated Products
STMicroelectronics L99BM114 Multicell Battery Monitoring/Balancing IC
For high-reliability industrial applications and energy storage systems.
STMicroelectronics L99BM1T SPI-to-Isolated SPI Transceiver
Creates a communication bridge between devices in different voltage domains.
Dev Tools
STMicroelectronics STEVAL-BMS114TX BMS Evaluation Board
The board operates from 4 to 14 battery cells and uses the L99BM1T embedded transceiver.
STMicroelectronics STEVAL-BMS1T SPI to Isolated SPI Dongle
Allows SPI signals to be converted into isolated SPI signals, decreasing wires from four to two.
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STMicroelectronics Standard Products
A broad range of drop-in replacements for general-purpose analog ICs, discretes, and serial EEPROMs.